DGN GAS installs and replaces boilers across Harlington (UB3) — the village by Heathrow, from the interwar semis around the green to homes near the ancient parish church. Gas Safe registered, Worcester Bosch, Vaillant and Baxi installer. Free no-obligation quotes.
Across Harlington — the old village tucked between Hayes and Heathrow — DGN GAS replaces ageing boilers and installs modern heating sized to the property. Our Gas Safe registered, F Gas qualified team covers boilers, Megaflo cylinders, underfloor heating, heat pumps and air conditioning across UB3.
From a like-for-like combi swap to a full system in a larger family home, every Harlington install is carried out to the same standard, cleanly and tidily.
Harlington keeps a real village feel despite sitting on the edge of Heathrow — its historic core around the medieval church of St Peter and St Paul and the famous thousand-year-old Harlington Yew, surrounded by interwar and postwar semis and terraces. Many of these homes are on their original or second boiler; we right-size a modern combi for a typical semi, or a system boiler and cylinder where a family needs more hot water, and tidy up tired pipework and controls at the same time.
Being close to the airport, Harlington has a steady mix of family homes and rental property, and we look after both — reliable replacements that pass their Gas Safe checks. The homes here generally have good driveways and rear access, so a swap is a clean single-visit job. We cover all of Harlington and out to Hayes, Cranford, Sipson and Harmondsworth.
New boiler installation and replacement across Harlington. Worcester Bosch, Vaillant, Baxi and ATAG supplied and fitted — every install includes a full flush of the system, Gas Safe certification and manufacturer warranty registration.
Unvented hot water cylinder installation in Harlington. Megaflo specialists — our work was featured in the Megaflo installer campaign.
Air source heat pump installation in Harlington. Government grant up to £7,500 available. F Gas qualified engineers.
Wet underfloor heating for new builds, extensions and renovations across Harlington. Full system design and installation.
Split system and multi-room air conditioning installation in Harlington. F Gas qualified. All major brands supplied and installed.
Full central heating system installation and upgrades across Harlington. New systems, extensions and heat pump ready installations.
If your radiators have cold spots, your system’s noisy, or your boiler keeps cutting out, the usual suspect is sludge and corrosion in the pipework — and a powerflush may be the fix. Often people are told on a service that their system needs flushing, or notice radiators that won’t warm up properly.
We assess the system and carry out the right flush to clear the blockages that wreck efficiency and shorten a boiler’s life. It’s a high-value job we do right across London as a standalone service — and on a new boiler install we always include a full flush of the system as standard. See our powerflush service for what’s involved.
All gas work carried out by Gas Safe registered engineers. Registration No. 623092. F Gas qualified for air conditioning and heat pump installations.
Baxi Approved, Vaillant Advance & Worcester Bosch Installers. Manufacturer warranties fully protected on every installation.
Verified five-star reviews from homeowners, landlords and families across London. Read them on our Google Business Profile.
Our team serves clients in English, Punjabi and Hindi — ਪੰਜਾਬੀ ਅਤੇ ਹਿੰਦੀ ਵਿੱਚ ਵੀ ਗੱਲ ਕਰ ਸਕਦੇ ਹਾਂ
Serving Harlington
Homeowners across Harlington and the wider Ealing borough trust DGN GAS for clean, one-day installs — here’s what they say:
"Over the moon with our new underfloor heating system and boiler. Top service by DGN."
"Ravinder at DGN Gas has consistently looked after me. Alongside the annual boiler service, they carried out the Vaillant boiler and underfloor heating installation at my home. I'll be using them again."
Most semi swaps in Harlington are done in a day, with a full system change taking two to three days. We confirm the timescale before any work starts.
Yes — old boiler and any redundant tanks cleared out, disposed of properly, and everything tidied up before we go.
Yes — we work right across UB3 and into Hayes, West Drayton and Cranford, so it’s one local team from install to servicing.
As well as Harlington, DGN GAS installs and services heating across neighbouring areas including Hayes, West Drayton, Cranford, Sipson and Southall. View all boiler installation services or see our full coverage area.